This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Please recognize the U.S. Geological Survey (USGS) and the Southwest Washington Coastal Erosion Study (SWWCES) as the source of this information.
The original data filenames are pie-coe1.xyz and 1999wi010.dat
Data were reprojected to Washington Stateplane South-NAD83, FIPS 4602 and MLLW meters.
Inidividual coverages (piecoe1 and wb99c) were combined to create willapa99
NAVD88 depths were calculated using the offset determined at the Westport tide gauge, where NAVD88 depth = -0.46m + MLLW depth.
Data were collected using a combination of a Single 3 Degree Beam, 200 Khz Transducer. Tides were reduced using RTK tides